First Crash-site pic
http://www.ledauphine.com/haute-provence/2015/03/24/un-a320-s-ecrase-dans-la-zone-de-barcelonnette
Seems to be spread out, but there is nothing to give any scale to the pic.
Somebody at CNN is reading this thread.
They just mentioned gradual depressurization at altitude.
From Le Dauphine’s pics, that is indeed extremely rugged-looking country. Not significant snow, though.